Which of the following effects may occur if the amortization phase of a plyometric exercise is prolonged?

The amortization phase of plyometric exercises refers to the transition period between the eccentric (stretching) phase and the concentric (shortening) phase. When this phase is prolonged, one of the key effects is that the stored elastic energy in the muscles and tendons begins to dissipate. This dissipation reduces the potential energy available for the subsequent explosive movement.

A longer amortization phase means that the muscles may lose the tension needed to execute a powerful unloading phase, leading to a decrease in performance. The effectiveness of plyometric training relies on the quick transition between these phases to maximize the stretch-shortening cycle. Thus, prolonging the amortization phase negatively impacts performance by reducing the power output of the subsequent movement.

In contrast, other options suggest improvements or lessening of fatigue, which are not accurate outcomes of an extended amortization phase. The core principle behind plyometric strength and power development is maintaining an optimal and quick transition, making the correct answer particularly relevant in understanding plyometric training dynamics.